Reference Loop; Figure 7: Dual Link Information Placement In Waveform Display - Tektronix WFM5200 User Manual

Reference Loop

WFM5200 Waveform Monitor User Manual
Your instrument automatically detects the format on signals with SMPTE352M
(VPID) while operating on Dual Link signals. You can then view combined Link
A, Link B, and Alpha Channel information, which can help with the identification
of correct content. Alpha Channel information is visible, if present. The following
illustration is an example of how the signal components would appear. (See
Figure 7.)

Figure 7: Dual Link information placement in waveform display

Reference signals can be Black Burst or Tri-level sync. After you connect the
appropriate reference signal, press the EXT REF button the on the front panel
of the instrument. You can also choose which format to lock to by pressing the
CONFIG button and selecting External Ref. The default setting is Auto.
The reference input is passive and requires external termination. If you install
this instrument to monitor an operating link, the destination receiver and the
connecting cable serve as the termination. This monitoring connection checks the
performance of the entire path. The return loss of the instrument is sufficiently
high that, in most cases, the destination receiver sets the system return loss.
Signal Inputs and Outputs
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